MP28367 Datasheet, PDF (1/9 Pages) Monolithic Power Systems – 1A, 21V, 1.4MHz Step-Down Converter in a TSOT23-6

TM
The Future of Analog IC Technology ^TM
DESCRIPTION
The MP28367 is a monolithic step-down switch
mode converter with a built-in internal power
MOSFET. It achieves 1A peak output current
over a wide input supply range with excellent
load and line regulation. Current mode
operation provides fast transient response and
eases loop stabilization. Fault condition
protection includes cycle-by-cycle current limiting
and thermal shutdown.
The MP28367 requires a minimum number of
readily available standard external components.
The MP28367 is available in TSOT23-6 packages.
MP28367
1A, 21V, 1.4MHz
Step-Down Converter in a TSOT23-6
FEATURES
• 1A Output Current
• 0.35Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 90% Efficiency
• 0.1μA Shutdown Mode
• Fixed 1.4MHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• 6V to 21V Operating Input Range
• Output Adjustable from 0.81V to 15V
• Available in TSOT23-6 Packages
APPLICATIONS
• Distributed Power Systems
• Battery Charger
• Pre-Regulator for Linear Regulators
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
V_IN
12V
OFF ON
5
IN
1
BST
CB
10nF
6
SW
MP28367
D1
B230A
4
EN
GND
2
3
FB
V_OUT
3.3V @ 1A
Efficiency vs
Load Current
100
95
VOUT = 5V
90
85
80
VOUT = 3.3V
75
70
65
60
55
VIN = 12V
50
10
100
1000
LOAD CURRENT (mA)
MP28367 Rev. 0.9
www.MonolithicPower.com
1
12/13/2007
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